Twin sole-laying press



Dec. 12, 1933. o. MICHALK TWIN SOLE LAYING PRESS Filed July 27, 1932 3Sheets-Sheet 1 Dec. 12, 1933. o. MICHALK TWIN SOLE LAYING PRESS FiledJuly 27, 1932 3 Sheets-Sheet 2 Jay Dec. 12, 1933. o. MICHALK 1,939,510

TWIN SOLE LAYING PRESS Filed July 27, 1932 3 Sheets-Sheet 3 1576e12f19e13 16 15 5 moulds for all sorts of foot-wear and all trussesUNITED STATES PATENT OFFICE.

Otto Michalk, Freital, near Dresden, Germany Application 'July 27, 1932,Serial No. 625,077, and in Germany August 3, 1931 5 Claims. (01. 12 -3s)In the known twin and multiplesole presses strong rubber rests withsprin laying gs are used as pressing means, these rests being employedin connection with normal pressing of the joints, in consequence whereofan adaptation of the sole to the shape of the last is not warranted.Besides, those twin sole laying presses which are operated withtoggle-joint levers or with spindles suffer from the drawback that thetime during which the sole is pressed .against the rubber pressing padistoo because the shoe that is attached to the pressed on only .in the,highest position {revolution while the machine is being short, last isof the driven.

In order to obviate the above-mentioned draw- .backs it had beenproposed to make use pressure sticking presses for the laying of airofthe soles, said presses operating, for instance, in connection with arotary table, but with the presses the shoe can be removed from thepressing mould only after the table has performed a complete revolution.

This manner of working is too slow for an economicahmanufacture [ofshoes. Especially with welt sewn shoes, as

chiefly manufactured ,to-day' itwould be necessary to lay the soles ofthe shoesv and to remove them from the press in the same rate of time aswith the high-speed sole cutting'machine.

The twin sole laying press forming the subjectmatter of the present.invention responds to all requirements in "that 'by the closingpressure exerted by the compressed air in the clamping device of the onepress the clamping device of the other press is relieved and reverselyItiS suited to the purpose toequip'the machine with a foot valveandachange-over valve, the

operation being then this that by the foot valve not only theclampingdevice is in steps subjected to pressure, but also the air pad issubjected to pressure across the change-over valve, and the tensioningdevice of the neighbouring laying A sole laying pressimproved accordingto this invention is illustrated diagrammatically and by way of exampleon' the ings on which accompanying draw- Figure 1 is a side-view of thesame, also the pressing cylinder and the foot valve being shown in thisfigure.

1 Figure 2 is a plan of the-press.

Figure 3 is a vertical section through t he foot valve, this figurebeing drawn to a greatly enlarged scale relatively to Figs. 1 and 2.Figure 4 is a plan 'of the foot-valve, also drawn to that enlargedscale. Figures 5 and 6 are views similar to Fig. 3, showing two otherpositions of the foot-valve.

Figure 7 is a side-view of the clamping-in I device, this figure beingalso drawn toan enlarged scale relatively to Figs. 1 and 2.

Figure 8 is a rear-view of the clamping-in device.

in the height of the plate of a table, two'pneumatic pressing moulds,each consisting of a pressing pad 8 (Fig. 1), an abutment support 8 anda clamping device '7, to which pertains a double-armed lever 7' which issupported at the point 7" and the rear arm of which can be actuated by ahead-member 6". At the rear side of the standard a is a compressed-aircylinder 6, in which is a piston 6', the rod of which bears on its topsaid member 6". The cylinder 6 can be supplied with compressed air, andcan also be relieved from the pressure of the same, by means of the footvalve 1 by the intermediary of the pipes 4 and 5. The compressed air iscontained in a receptacle 3 which is connected with the foot-valve 1through the pipe 3.

,is another helicalcompression-spring 2 which is compressed, however,only after the spring '2" has been compressed in a certain measure, asappears from Figs. 5 and 6. When the plunger 2' is in the position shownin Fig. 3, the pipe or passage 3 does not communicate either with thepipe 4 or with the pipe 5. In the position shown in Fig. 5 thepassage 3communicates with the pipe 4,\and in the position shown in Fig. 6'thepassage 3 communicates with the pipe 5. In

Fig. 5 only the spring 2" has been compressed, and in Fig. 6 the spring2 has been compressed,

7 too. The two springs are, thus, compressed one the head members 6" ofthe piston rods of--the compressed-air cylinders 6, as well as by cams.6 and also by pawls 15 which are subjected to" the pressure of platesprings 16. .The valve 12;is

connected with an air-cylinder 11 (Figs. 7 and 8) through a pipe 17.Thecylinder 1-1" is attached to the lever 7. Asthere are twopressingplaces, there are, of course, two sets of the mechanismsdescribed in this paragraph.

Release of the clamping device is 'efiectedby the piston 11' of the aircylinder llwhich .withdraws a pawl 9 from a ratchet rack 10 whereby thelever '7 is permitted to return into Jits position of rest whichis thatshown in dotted'lines in Fig.1. I The manner of operation of the valve12 is as follows: v

When the shoe has been'placed into'the' press in order to have its soleshapedjfirst'the foot knob 2 is depressed. counter to the pressure ofthe sprin'g'2 until the counter-pressure f. the

spring 2 becomes perceptible (Fig. this position of the plunger 2 the.circumferential l groove b establishes a communication between the pipes3 and i, so that the compressed air can flow through thepressui'ereducing valve 4" (Fig. 1) into the air cylinder 6, whereupon the nowlifted head member 6'efie cts closing' of the clamping device. 7 with acertain moderate pressure by the intermediary of the lever, 7.

lWhenthe knob 2 is further depressed, also the counter-pressure of thespring 2 isovercome' and the position of the plunger is now such"thatthe pressure pipe 3.'communica'tes with the 1pipe'5 by theintermediary of the. annularogroove b, thecompressed air flowing nowfromthe receptacle 3' to'the cylinder 6.1wherebythe. pistonin thiscylinder is lifted, as is,.therefore, also the head 6", and theshoe'located'upon'thelast. will =now-befirmly pressedju'pon 'the pad 8.I The last with the shoe thereon isautomatically retained in thisposition by the pawl 9' and the ratchet rack 10 (Fig. 7).' Whenthereafter. the. foot is removed from the knob 2- this latter. is.automatically lifted by the spring 2" so that theplunger 2' ismoved-back into its original position (Fig. 3) in which the annulargroove b connectsfthe pipe 5 with the blow-off .channel. 5'}, throughwhich .theair. escapes from the cylinder, andal'so the members 6 and6re-ass umenow, their position of-rest which isthat shown in Fig; 1.

, Eachpiston-rod head 6" co-operates .with the twin. valve 12 (Figs. 9and-'10). The compressed airis conducted. to this valve from the airreceptacle 3' through the pipe 19 (Fig. 7);, 1 When the left-hand head6" rises into its. highest position,- its cam 6 shifts the plunger 14'to .the

right and the pawl l 5-moves past the plunger-13 without actuating it(Fig.10) The-pipes120. and 21.- conduct the compressed air .to the twoadjaacenttpressingzpads. .Theannular groove e of :theplunger 14 connectsthen the pipes 20;.,and -17 witnthe blow-out hole 24wherebyithemdjacentpad 8 and the, appertaining pressure;= cylin-.derllare emptied; The pawl 9 ;engages the-pp,-

pertaining ratchet rack 10 whereby the shoe located upon the pressingpad is retained thereon. When the plunger 6 gets back into its formerposition, as already described, the left-hand pawl presses the plunger13 to the right (Fig. 10) whereby the annular groove f of this plungerestablishes a communication'between the pipe 19 and thepipes 21 and 1'7.Owing thereto, the air flows: into the pressing pad and into the aircylinder'of theother pressing place. The piston 11 of--the--cylinder 11will now be shifted and will lift the pawl 9 off from the ratchet rack10 so that the lever '7 is disengaged (Fig. 7). The respective-pressingplace is now freely accessible and the shoe can be removed therefrom.--The-'-efiectsobtained by the above-described ;=air iv alvecontrol-are, thus, the following:

.;Fi rstly, the shoe is, by depressing the foot knob 2, clamped fast bycompressed air at the pressing place, is locked in its position, and atthe same time ,the other pressing place is relieved from 'the actionofthecompressed air, and '1'Second1y.,when the foot isv Withdrawn fromthe'foot knob the pad of the other pressing place is'filled with thecompressed air and the clamping device of the first pressingplace isreleased. Theseproceduresare continually repeated. When the foot, knobis again depress ed, the members of the ,second'pressing placeareactuated in the described manner, and so on, alternately. Whena shoe hasbeen clampedfast at 'thelright-handpressing place, that atjthe letthandis released, and this alternating. procedure is continued. I Y IFina1lyfI..mention.that an aircock 23 (Figsk'i and 8) is inserted, intothe pipe and into the pipe'21.whereby itjis rendered possible to let the-compressedair escape at once from theone or the/other pressingpad sothat the sole'can be shiftediin caseitshould have been put on in animproper: position.

I claim:

1..A". twin. sole laying press, comprising, in combination. withpneumatic pressing pads, and with'pneumaticmeans for clamping thelastwith .the shoethereonfast upon the .sole located upon the pneumaticpressing pad, means for con- ,trollingthe supply .of the compressed airto, and its dischargeifrom,..saidpads and their clamping meansin-suchamanner. .thatone of said pads and its ,clampi r igmeans are suppliedwith the vcompressed air. andfat. the same time the other pad and itsclampingjmean's are liberated from the compressed air; and reversely.

2(A" twin. sole. laying-press, comprising, in combination,withpneumaticpressing pads, and withpneumatic means for. clamping thelast with theshoe thereon fast upon the sole located upon .the.pneumaticjp'ressingl-'pad, a reversing compressed-air valvearrangedbetween the two pressing ,devices, a compressed-air cylinder ateachpressing device, apiston and a piston rod in eachcylinder; andcamsprovided on. said rods, .said reversing, valveand I said cams beingso arrangedwith r'espe'ct toone another as to be -adapted to. reversesaid .valve in such a manner that one ofsaidpadslandits clamping means.are supplied,-with -thecompressed air and at the .same time the other;and its clamping means are liberated from the compressed air,.:and;-..re.vers 1y. I

3: A:.1twin.=;s91 layin pre ommis s in combination with pneumaticpressingpads, and with pneumatic ,means for, clamping the last with theshoe-ther onfast.1 pmt er qlel pa edpp the pneumatic pressing pad, meansfor controllingthe supply of the compressed air to, and

its discharge from, said pads and their clamping means in such a mannerthat one thereof is supplied with the compressed air and at the sametime the other pad and its clamping means are liberated from thecompressed air, and reversely, a pressure reducing valve inserted intothe compressed-air supply conduit to said clamping means, and a valve soarranged as to be adapted to be actuated by a foot of the operator andso designed that the appertaining clamping means is subjected in stepstothe pressure of the air.

4. A twin sole laying press, comprising, in combination with pneumaticpressing pads, and with pneumatic means for clamping the last with theshoe thereon fast upon the sole located upon the pneumatic pressing pad,a compressed-air valve so' arranged'as'to be adapted to be actuated by afoot of the operator and so designed that it controls the supply of thecompressed air to one of said pads and its clamping means and controlsat the same time the discharge of the compressed air from the other padand its clamping means, and reversely. V r

5. A twin sole laying press, comprising, in

combination with pneumatic pressing pads, and

with pneumatic means for clamping the last with the shoe thereon fastupon the sole located upon the pneumatic pressing pad, 'a compressed-airvalve so arranged as to be adapted to be actuated by a foot of theoperator and so designed that it controls the supply of the compressedair to one of said pads and its clamping means and controls at the sametime the discharge of the compressed air from the other pad and itsclamping means, and reversely, and a pressure reducing valve insertedinto the compressed-air supply to.

said clamping means.

- O'I'IO MICHALK.

